Volcano Choir is an American indie rock band from Wisconsin, formed in 2005. It has released two albums, Unmap and Repave. History The band began as a collaboration between Bon Iver's Justin Vernon a
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6543050a14467183ff681212481d6ff545e948e7ba22a5ded7f0f6b650ef92da. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/958e6d74-0892-44a3-a9e3-7bcf3726a7ac.json and https://artists.proofprofile.net/proofs/artist/958e6d74-0892-44a3-a9e3-7bcf3726a7ac.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9564f144e46c3294b65ffef131e4307ddbe50e44e4d86662a51f8f5745a32eeb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US38Y1323801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178c7cef885f12a0777af4eea5f1dc6df470487c423380b242cf3d73463ae0f8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US38Y1323802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9de1f3a00425f8a60b39c8ae72b9932f293622d621c824e78904704e26f199. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US38Y1323803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f3162a9a71170258c9c4185ebbbbf9c883ef57c27fea797abd2718223e4552. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US38Y1323804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28cc4050fd790be50ef0256f47e461612a3766e484740b058d52d0e7a26abbfe. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US38Y1323805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77d56a8e5590194a123ef1010e18d04e95fe74f7940ad631f871fb31155798f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US38Y1323806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e392935ade70953ae67f081cba157dbe70ffb444f924af30c5d8710a0c28a8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US38Y1323807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf317cc59cac59de330aaaf751c5543dfa261409722f316cd57279c50ce5ba80d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US38Y1323808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676fa047abc740605ccf23c41b58520f403e6e19aafcfda67ac667d07a6d658a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US38Y0915601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa0de948706343ad4f64949ff6d56642de92b5afe261c15b2ac1cbc8d068d51. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US38Y0915602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7b6786904bfd745220d21cffe1441f5567a02aef50e2e2a35dde629475c890. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US38Y0915603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88c28b16c5225dbf356356996a9fd06638d23090921c83fdcf166e90207fc22. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US38Y0915604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f164c98369233026f25f8880701a003b442f3d36d8e52de3fb50acdaf02ee02. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US38Y0915605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721ed730dac78477a1d82406b22a8eda7fea1be5ed4541ab9d2d11c3fe692c49. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US38Y0915606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3d8e9f3f9eecc6edb28241deb38a7957fb5abe64d347f11feeae7cc4260b46. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US38Y0915607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1276163d1541c146307c26c6ffb86ae0b9d1898bc3d2513480a981e70b5824. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US38Y0915608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf12bd8b6c68a9963648ce30f4f0591ff4080abd3b14382b05190e1d3c11054. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US38Y0915609.